george gray



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TO ALL WHOM IT MAY CONCERN Be itknown that I, GEQRGE GEM ,dfTemperanceville, in the county of Allegheny, and State of Pennsylvania,have invented a new and improved compound for Artificial Fuel and I dohereby declare that the following is a clear, full, and exactdescription of the same, and. of the manner of preparing it.

It is Well known'that at the mines, and also at large coal yards in andabout cities, large masses of fine coal, known as coal-dust, accumulate;and that the same is almost if not entirely useless while in thecondition of coal-dust. This dust is composed of-fine particles ofco'a'l, generally very free from slate, and would make a good article offuel if it could be compacted intolumps of proper size to lay loosely onthe grate, and to be handled and transportedlike lump coal. Toaccomplish this object, I take of this dust in the proportion of oneton, and add to it ofpitch eight to ten pounds, and of rosin one pound.'The pitch and rosin are first melted in a suitable vessel, and thedustis then mixed in, and the whole mass thoroughly stirred and mixedtogether, until the particles are thoroughly coated over their entiresurface, when the mixture is placed-in moulds of the proper size, andpressed into cakes or lumps and allowed to cool.

In carrying out my invention on a large scale, I propose'to usemachinery of suitable construction for mixing the ingredients, and alsofor pressing it into cakes. This machinery may be so arranged as todeliver to themixing vessel the ingredients in their proper proportions,and also to deliver the compound from the mixing vessel to the pressautomatically.

The compound may, if prepared at the mines, be formed into large cakes,say of twenty-five, fifty, or even one hundred pounds weight, in theform of large bricks, for convenience in handling and transporting, andmay then be broken up into pieces of suitable size for burning at theplace Where it is to beused.

When the dust is very fine, it.,will be necessary to increase slightlythe quantity of pitch and rosin used, in order to render the masscompact.

Having thus described my invention, what I claim, isp The artificialfuel, composed of the ingredients, prepared in the manner andproportions substantially as set forth.

GEORGE GRAY.

Witnesses:

Lnomno S. J onus, Ms. L. READ.

